MediAI

 Edited by ScholarGen MediAI Team Executive Clinical Summary A patient in his 60s presents with shoulder discomfort and restricted range of motion. In this age group, rotator cuff disease and degenerative glenohumeral osteoarthritis are often considered first. Yet when the rotator cuff is preserved and imaging demonstrates an unusually small or malformed glenoid, the diagnostic pathway should change. This case illustrates an important imaging diagnosis: glenoid dysplasia . The key abnormalities include marked glenoid and scapular-neck hypoplasia, pronounced glenoid retroversion, posteroinferior glenoid hypoplasia, posterior subluxation of the humeral head, hypertrophic posterior labral tissue, progressive cartilage degeneration, and a small joint effusion. The rotator cuff and long head of the biceps tendon are described as preserved. The central radiologic concept is not simply that the glenoid is small. Rather, the abnormal bony morphology alters the biomechanics of the glenohume...